refactor: optimize the events about pods

[shaofan-hs]

1. Does this PR affect any open issues?(Y/N) and add issue references (e.g. "fix #123", "re #123".):

re #172

• N
• Y

2. What is the scope of this PR (e.g. component or file name):

3. Provide a description of the PR(e.g. more details, effects, motivations or doc link):

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Other

4. Are there any breaking changes?(Y/N) and describe the breaking changes(e.g. more details, motivations or doc link):

• N
• Y

5. Are there test cases for these changes?(Y/N) select and add more details, references or doc links:

• Unit test
• Integration test
• Benchmark (add benchmark stats below)
• Manual test (add detailed scripts or steps below)
• Other

6. Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[codecov]

Codecov Report

Attention: Patch coverage is 76.92308% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 65.51%. Comparing base (4544135) to head (6dc1450).
Report is 3 commits behind head on main.

Files	Patch %	Lines
...lers/podopslifecycle/podopslifecycle_controller.go	80.00%	0 Missing and 2 partials ⚠️
.../controllers/poddeletion/poddeletion_controller.go	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #173      +/-   ##
==========================================
+ Coverage   65.11%   65.51%   +0.40%     
==========================================
  Files          74       74              
  Lines        4810     4817       +7     
==========================================
+ Hits         3132     3156      +24     
+ Misses       1397     1375      -22     
- Partials      281      286       +5     

Flag	Coverage Δ
unittests	65.51% <76.92%> (+0.40%)	⬆️

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[wu8685]

lgtm